Zillow analysis finds big disparities among some, but not all, markets.

Families spend an average of $9,073 more per year to cover basic housing and child care costs in the city than in the suburbs, according to a new Cost of Living analysis from Zillow and Care.com

Nationally, based on the costs of property taxes, mortgage payments and child care, families living in the city spend $43,652 a year. Yet, in the suburbs they spend just $34,579. New York, Chicago and Dallas have the highest variance between urban and suburban living, with city dwellers paying as much as $71,237 more a year, or nearly $6,000 extra a month. However, city living is not always more expensive. In Philadelphia and Baltimore, families could pay up to $14,000 more a year to live in the suburbs.